Energy Converter
Convert between joules, calories, kilowatt-hours, BTU, and more.
✅ 100% Free
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⚡ Instant Results
What is a Energy Converter?
An energy converter changes an energy measurement from one unit to another.
How to Use This Energy Converter
- Enter the value.
- Select the source unit.
- Select the target unit.
- Click Convert.
How It Works
All units are defined as fixed multiples of the joule (J).
Example Calculation
1 kcal = 4,184 J = 4.184 kJ.
Frequently Asked Questions
How many joules are in a calorie?
One small calorie equals 4.184 joules.
Privacy & Data Processing
All calculations run in your browser.
Last updated: 2026-10-01